# Series and Number Patterns IQ Test Practice Questions

#### Question No 1

Which two letters come next in the sequence A , D , I , P , Y , CF , DI , FD , ?

Solution!
take the numerical position of each letter in the alphabet to reveal the sequence of consecutive square numbers 1, 4, 9, 16, 25, 36, 49, 64, 81.

#### Question No 2

1 , 1 , 2 , ? , 24 , 120 , 720

Solution!
Multiply by 1, 2, 3 and so on....

#### Question No 3

F , O , T , W , ?

Solution!
Skip 8 , 4 , 2 , 1 alphabets..

#### Question No 4

0 , 100 , 6 , 94 , 12 , 88 , 18 , 82 , ? , ?

Solution!
There are two sequences interwoven.! !Add 6 starting at 0 and deduct 6 starting at 100..

#### Question No 5

6 , 10 , 18 , 34 , 66 , ?

Solution!
Add 4 , 8 , 16 , 32,....

#### Question No 6

8 , 16 , 32 , 64 , 128 , ?

Solution!
Multiply previous term with 2 to find next term..

#### Question No 7

1 , 2.65 , 4.3 , 5.95 , 7.6 , ?

Solution!
1.65 is adding in each term..

#### Question No 8

87 , 102 , 119 , 138 , 159 , ?

Solution!
Adding 15 , 17 , 19,....

#### Question No 9

A , B , D , I , ?

Solution!
Multiply position of previous alphabet with 3 and subtract 1 , 2 , 3,... respectively..

#### Question No 10

2 , 7 , 5 , 5 , 8 , 3 , 11 , ?

Solution!
Two parallel series one with adding 3 and other with subtracting 2..

#### Question No 11

3 , 6 , 9 , 12 , 15 , ?

Solution!
Add 3 in previous term to find next term..

#### Question No 12

100 , 98 , 94 , 88 , 80 , 70 , ?

Solution!
Deduct 2, 4, 6, 8, 10, 12.

#### Question No 13

Which number is the odd one out, 41, 43, 47, 53, 61, 71, 73, 81

Solution!
Each of the numbers except 81 is a prime number..

#### Question No 14

1 , 2 , 4 , 8 , ?

Solution!

#### Question No 15

F , G , I , L , P , ?

Solution!
Skip alphabets 0,1,2,....

#### Question No 16

100 , 96.75 , 93.5 , 90.25 , 87 , ?

Solution!
Deduct 3.25 each time..

#### Question No 17

Which number is the odd one out, 835, 734, 642, 751, 853, 981, 532

Solution!
In each number except 751, the difference of third and first digit is the middle one..

#### Question No 18

7 , 10 , 25 , 94 , 463 , ?

Solution!
7*2 - 4 = 10!and!10*3 - 5 = 25!and!25*4 - 6 = 94!and!94*5 - 7 = 463!In the same way!463*6 - 8 = 2770.

#### Question No 19

25 , 50 , 27 , 46 , 31 , 38 , 39 , ?

Solution!
There are two interwoven sequences.!Add 2, 4 and 8 from the sequence starting with 25!and subtract 4, 8 and 16 from the sequence starting with 50.

#### Question No 20

100 , 97 , 91 , 82 , ?

Solution!
-3 , -6 , -9 , -12!(Multiples of 3 are subtracted).

#### Question No 21

9 , 16 , 13 , 13 , 17 , 10 , 21 , 7 , ?

Solution!
There are two interwoven sequences! !Add 4 starting with 9! !and subtract 3 starting with 16..

#### Question No 22

E , H , K , N , Q , T , ?

Solution!
Skip two alphabets..

#### Question No 23

2 , 6 , 18 , 54 , 162 , ?

Solution!
Multiply previous term with 2 to find next term..

#### Question No 24

B , W , F , P , M , E , ?

Solution!
Two parallel series one with skipping 3 , 6,... alphabets and other with skipping 6 , 12,... alphabets..

#### Question No 25

7 , 13 , 24 , 45 , 86 , ?

Solution!
Multiply previous term with 2 and subtract 1 , 2 , 3,... to find next term..

#### Question No 26

3 , 10 , 33 , 104 , ?

Solution!
Multiply with 3 and add 1, 3, 5, 7,....

#### Question No 27

2 , 6 , 15 , 34 , 73 , ?

Solution!
Multiply with 2 and add 2 , 3 , 4 , 5 , 6,....

#### Question No 28

12 , 14 , 34 , 36 , 56 , 58 , 78 , ?

Solution!

#### Question No 29

C , G , L , R , ?

Solution!
Skip 3 , 4 , 5,... alphabets..

#### Question No 30

XYZ , WVV , VSR , UPN , ?

Solution!
Subtract 1 from first 3 from second and 4 from third character..

#### Question No 31

B , D , F , H , J , L , ?

Solution!
Skip one alphabet..

#### Question No 32

X , U , Q , N , J , G , ?

Solution!
Skip 2 and 3 alphabets alternatively in reverse..

#### Question No 33

Which number is the odd one out, 16, 25, 36, 72, 144, 196, 225

Solution!
Each of the numbers except 72 is a perfect square..

#### Question No 34

Which number is the odd one out, 2, 5, 10, 17, 26, 37, 50, 64

Solution!
(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1! !But, 64 is out of pattern..

#### Question No 35

Which number is the odd one out, 1, 4, 9, 16, 20, 36, 49

Solution!
All other numbers are perfect square of numbers but 20 is not perfect square of any number..

#### Question No 36

17 , 20 , 19 , 22 , 21 , 24 , 23 , ?

Solution!
Add 3 and subtract 1 alternatively..

#### Question No 37

1/3 , 3/7 , 6/13 , 10/21 , 15/31 , ?

Solution!
Add 2 , 3 , 4,... in numerator and add 4 , 6 , 8,... in denominator..

#### Question No 38

3 , 7 , 2 , 47 , ?

Solution!
3^2 - 7 = 2!7^2 - 2 = 47!In the same way!2^2 - 47 = -43.

#### Question No 39

0.67 , 0.69 , 0.48 , 0.88 , 0.29 , 1.07 , ?

Solution!
There are two series!Subtract 0.19 from the series starting with 0.67 and add 0.19 from the series starting with 0.69..

#### Question No 40

9 , 11 , 17 , 35 , ?

Solution!
Add 2 , 6 , 18 , 54,...!here!6 = 2*3!18 = 6*3!and!54 = 18*3.

#### Question No 41

1 , 4 , 9 , 61 , 52 , ?

Solution!
Square 1 , 2 , 3,... and change the sequence of digits..

#### Question No 42

14 , 16 , 28 , 32 , 42 , 48 , 56 , 64 , ? , ?

Solution!
There are two interwoven sequences, add 14 starting at 14 and add 16 starting at 16..

#### Question No 43

C , F , K , R , ?

Solution!
Skip 2 , 4 , 6 , 8,... alphabets.

#### Question No 44

5 , 5 , 3 , -1 , -7 , ?

Solution!
Subtract 0 ,2 , 4,....

#### Question No 45

T , Q , M , H , ?

Solution!
Skip 2 , 3 , 4,... alphabets in reverse order..

#### Question No 46

Which is the odd number out, 9421 , 7532 , 9854 , 8612 , 6531 , 8541 ?

Solution!
All the other numbers have their digits in descending order..

#### Question No 47

1 , 1 , 3 , 15 , 105 , ?

Solution!
Multiply by 1, 3, 5, 7, 9.

#### Question No 48

759 , 675 , 335 , 165 , ?

Solution!
Each number is formed by multiplying the number formed by the first two digits of the previous number by its third digit.! !So, 16 * 5 = 80.

#### Question No 49

2 , -1 , 2 , -1 , 2 , ?

Solution!

#### Question No 50

O , P , R , U , ?

Solution!
Skip 0 , 1 , 2 , 3,... alphabets..

#### Question No 51

Which number is the odd one out, 10, 14, 16, 18, 21, 24, 26

Solution!
All numbers are even except 21..

#### Question No 52

Find the odd man out, 3, 5, 11, 14, 17, 21

Solution!
Each of the numbers except 14 is an odd number.! !The number '14' is the only EVEN number..

#### Question No 53

1.5 , 3 , 5.5 , 9 , 13.5 , ?

Solution!
Add 1.5, 2.5, 3.5, 4.5, 5.5.

#### Question No 54

What four-digit number should replace the question mark? 4342 (3176) 1726, 7995 (7516) 2162, 8418 (????) 1725

Solution!
Delete the digits outside the brackets that appear twice, and insert the remaining digits in the brackets in the same order that they appear outside the brackets!8418 (4725) 1725.

#### Question No 55

B , D , G , K , P , ?

Solution!
Skip 1 , 2 , 3,... alphabets..

#### Question No 56

B , L , R , T , ?

Solution!
Skip alphabets 10 , 6 , 2 , -2 , -6,....

#### Question No 57

N , N , P , L , S , I , W , ?

Solution!
Two parallel series. One with skipping 1 , 2 , 3,... alphabets in forward order and other with skipping same alphabets in reverse order..

#### Question No 58

2 , 20 , 42 , 68 , 98 , ?

Solution!
Add 18 , 22 , 26 , 30 , 34,....

#### Question No 59

110 , ? , 99 , 81 , 72 , 63 , 54 , 45

Solution!
Deduct the sum of the digits of the previous number each time..

#### Question No 60

71 , 25 , 83 , 37 , 95 , 49 , ?

Solution!
Two parallel series both with adding 12..

#### Question No 61

20 , 30 , 45 , ?

Solution!
Multiply previous term with 1.5 to find next term..

#### Question No 62

M , F , N , G , R , I , S , L , W , P , ?

Solution!
Two parallel series one with skipping 0 and 3 alphabets alternatively and other with skipping 0 , 1 , 2,....

#### Question No 63

Which number is the odd one out, 3, 5, 7, 12, 17, 19

Solution!
Each of the numbers is a prime number except 12..

#### Question No 64

F , I , M , P , T , W , ?

Solution!
Skip 2 and 3 alphabets alternatively..

#### Question No 65

C , F , J , O , ?

Solution!
Skip 2 , 3 , 4,... alphabets..

#### Question No 66

AZ , DX , HU , MQ , ?

Solution!
skip 2 , 3 , 4,... alphabets to find first character and subtract 1 , 2 , 3,... alphabets to find second character..

#### Question No 67

2 , 5 , 10 , 17 , 26 , ?

Solution!
add 3 , 5 , 7 , 9 , 11,....

#### Question No 68

6 , H , 9 , K , 11 , M , 14 , P , 16 , R , 19 , U , 21 , ?

Solution!
Add 3 and 2 alternatively in number series and skip 2 and 1 alphabets alternatively.

#### Question No 69

492 , 366 , 189 , 810 , ?

Solution!
8 * 1 = 8, 8 + 0 = 8.

#### Question No 70

0 , 1 , 4 , 9 , 16 , 25 , 36 , 49 , ?

Solution!
Add 1, 3, 5, 7, etc..

#### Question No 71

3925 and 277 , 4697 and 2416 , 6257 and ?

Solution!
3 * 9 = 27! 5 + 2 = 7!(277).! !4 * 6 = 24!and 9 + 7 = 16!(2416)! !Similarly,!6 * 2 = 12!and 5 + 7 = 12!(1212).

#### Question No 72

108 , 189 , 216 , 225 , ?

Solution!
Add 81 , 27 , 9 , 3,....

#### Question No 73

78214 and 292 , 38421 and 459 , 69517 and ?

Solution!
78 + 214 = 292!38 + 421 = 459! !So, 69 + 517 = 586.

#### Question No 74

7/2 , 4 , 7 , 14 , ?

Solution!
Multiply previous 2 numbers and divide by 2..

#### Question No 75

Which number is the odd one out, 8, 27, 64, 100, 125, 216, 343

Solution!
All others are perfect cube of any number but 100 is not the perfect cube of any number..

#### Question No 76

9 , 18 , 27 , ? , 45 , ? , 63

Solution!

#### Question No 77

Which number is the odd one out, 1, 4, 9, 16, 23, 25, 36

Solution!
Each of the numbers except 23, is perfect square..

#### Question No 78

0 , 7 , 15 , 24 , 34 , ?

Solution!
add 7 , 8 , 9 , 10 , 11,....

#### Question No 79

Which number is the odd one out, 159, 248, 963, 357, 951, 852 ?

Solution!
In the rest there is the same difference between each digit! eg 8 (-3) 5 (-3) 2.

#### Question No 80

BZ , EW , HT , KQ , ?

Solution!
Skip 2 alphabets in forward order to find first alphabet and skip 2 alphabets in reverse order to find 2nd alphabet..

#### Question No 81

17 , 34 , 51 , 68 , ?

Solution!

#### Question No 82

1 , 1 , 2.5 , 3.5 , 4 , 6 , 5.5 , 8.5 , ? , ?

Solution!
There are two interwoven sequences.! !+1.5 starting at the first 1, and +2.5 starting at the second 1..

#### Question No 83

2 , 5.75 , ? , 13.25 , 17 , 20.75

Solution!

#### Question No 84

1 , 2 , 3 , 5 , 7 , 10 , 13 , 17 , 21 , ? , ?

Solution!
+1, +1, +2, +2, +3, +3, +4, +4, +5, +5.

#### Question No 85

Which number is the odd one out, 10, 25, 45, 54, 60, 75, 80

Solution!
Each of the numbers except 54 is multiple of 5..

#### Question No 86

156 , 76 , 36 , 16 , ?

Solution!
Subtract 4 from previous term and then divide it with 2 to find next term..

#### Question No 87

7 , 12 , 19 , 28 , ?

Solution!
add 5 , 7 , 9 , 11,....

#### Question No 88

B , C , E , G , K , ?

Solution!
Prime numbers 2, 3 , 5 , 7 , 11 , 13,....

#### Question No 89

2 , 14 , 32 , 56 , 86 , ?

Solution!
Add 12 , 18 , 24 , 30 , 36,....

#### Question No 90

Which number is the odd one out, 331, 482, 551, 263, 383, 362, 284

Solution!
In each number except 383, the product of first and third digits is the middle one..

#### Question No 91

Which number is the odd one out, 6, 9, 15, 21, 24, 28, 30

Solution!
Each of the numbers except 28, is a multiple of 3..

#### Question No 92

0 , 3 , 8 , 15 , ?

Solution!
Add 3 , 5 , 7,....

#### Question No 93

1000 , 971.4 , 942.8 , 914.2 , 885.6 , ?

Solution!
Deduct 28.6 each time..

#### Question No 94

4 , 7 , 15 , 29 , 59 , 117 , ?

Solution!
Multiply with 2 and subtract and add 1 alternatively..

#### Question No 95

3.4 , 6.3 , 9.2 , 12.1 , 15 , ?

Solution!
Add 2.9 in previous term to find next term..

#### Question No 96

1 , 4 , 2 , 5 , 3 , 6 , 4 , ?

Solution!
There are two interwoven sequences.! !First starts with 1 and second with 4!Add 1 in both series.

#### Question No 97

64521 is to 41256 as 38297 is to..

Solution!
A B C D E!6 4 5 2 1! !B E D C A!4 1 2 5 6! !A B C D E!3 8 2 9 7! !B E D C A!8 7 9 2 3.

#### Question No 98

100 , 50 , 200 , 25 , 400 , ?

Solution!
There are two interwoven sequences.! ! Multiply 2 starting at 100 and devide by 2 starting at 50..

#### Question No 99

180 , 140 , 179 , 138 , 177 , 134 , ?

Solution!
Two parallel series, one with subtracting 1,2,3,... and other with subtracting 2,4,6,....

#### Question No 100

1/32 , 1/16 , 1/4 , 1/2 , 2 , 4 , ?

Solution!
Multiply with 2 and 4 alternatively.

#### Question No 101

A , Y , W , U , S , Q , ?

Solution!
Skip one alphabet in reverse order..

#### Question No 102

5 , 2.5 , 1.25 , 0.625 , ?

Solution!
Divide previous term with 2 to find next term..

#### Question No 103

7964325 is to 6975234 , 5822139 is to 2859312 as 7469851 is to ?

Solution!
Reverse the first three digits then reverse the last four digits..

#### Question No 104

36 , 72 , ? , 144 , 180 , 216 , 252

Solution!

#### Question No 105

6 , 8 , 10 , 14 , 18 , 26 , 34 , 50 , 66 , ?

Solution!
Add 2, 4, 4, 8, 8, 16, 16,....

#### Question No 106

100 , 1 , 97.5 , 3.5 , 92.5 , 8.5 , 85 , 16 , ? , ?

Solution!
There are two interwoven sequences.! ! subtract 2.5, 5, 7.5 starting at 100 and Add 2.5, 5, 7.5 starting at 1..

#### Question No 107

63 , 35 , 15 , 3 , ?

Solution!
8^2 - 1 = 63!and!6^2 - 1 = 35!and!4^2 - 1 = 15!and!2^2 - 1 = 3!in the same way!0^2 - 1 = -1.

#### Question No 108

Which number is the odd one out, 396, 462, 572, 427, 671, 264

Solution!
In each number except 427, the middle digit is the sum of other two..

#### Question No 109

O , R , M , T , K , V , I , ?

Solution!
Two parallel series one with skipping one alphabet in reverse order and other with skipping one alphabet in forward order..

#### Question No 110

3/81 , 4/256 , 5/625 , ?

Solution!
Add 1 in numerator and in denominator!(3*3)^2 = 81!(4*4)^2 = 256!(5*5)^2 = 625!in the same way!(6*6)^2 = 1296.

#### Question No 111

-6 , 9 , -27/2 , 81/4 , -243/8 , ?

Solution!
Multiply previous term with -3/2 to find next term..

#### Question No 112

5 , 26 , 131 , 656 , ?

Solution!
Multiply by 5 and add 1 each time..

#### Question No 113

A , E , X , H , U , ?